Second, according to Tantra, there are six categories: like the voice of Brahma, cymbals, singing, the kalapinga bird, thunder, and the sitar. There are sixty aspects when each of them is multiplied by these ten: generating understanding, comprehensible, respectable, without discord, extremely profound, acceptable, indomitable, pleasing to hear, unconfused, and extremely distinct.

Moreover, there are sixty aspects when these ten natures each have six occasions: being most resonant, all-pervading, immediately comprehensible, clearing doubts, commanding presence, showing immediacy, completely engaging, interesting, distinctive, and taming everyone. [1]

References

↑*Appendix 10 in The Light of Wisdom Volume 1. Root text by Padmasambhava and commentary by Jamgön Kongtrül the Great. Published by Shambhala Publications ISBN 0-87773-566-2